I didn't do anything specificly for the hidden ores, I guess they return a different value on the client (thats why the crop says it cant grow) and on the server (but it can grow). Also I fixed that weird rendering, thanks for reporting.Interesting... It seems that the ore crops I was talking about will grow even after the ores become hidden. Waila says it can't grow, but it still does... I guess this means issue solved?
On a separate note, the Plant mega pack both the corn and cassava crops' growth stages are funky at 28% growth.